Katharine Ball, M.D.
NPI 1801004650 · Dermatology Physician · Saratoga, CA
Enrolled with Medicare as Practitioner - Dermatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Katharine Ball, M.D. is a Dermatology Physician provider in Saratoga, CA (NPI 1801004650).
Provider details
- NPI number
- 1801004650
- Entity type
- Individual
- Primary specialty
- Dermatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A106522 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
7,420 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Destruction of Precancer Skin Growth, 2-14 Growths17003 | 3,124 | $9 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 1,007 | $110 |
| Destruction of Precancer Skin Growth, 1 Growth17000 | 854 | $71 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 533 | $154 |
| Destruction of Skin Growth, 1-14 Growths17110 | 348 | $141 |
| Removal and Microscopic Exam of Growth of Head, Neck, Hands, Feet, Or Genitals, 1-5 Tissue Blocks |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 13 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ketoconazole | 125 | 61 |
| Triamcinolone Acetonide | 107 | 69 |
| Cephalexin | 102 | 89 |
| Fluocinonide | 76 | 44 |
| Clobetasol Propionate | 44 | 19 |
| Doxycycline Hyclate | 33 | 21 |
| Metronidazole | 29 | 23 |
| Hydroxyzine Hcl | 27 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$973 across 38 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (2)
- 2420 Samaritan DrSan Jose, CA 95124-3907Phone: (408) 369-5600Fax: (408) 369-5625
- 136 N San Mateo Dr Fl 2San Mateo, CA 94401-2778Phone: (650) 348-1242Fax: (650) 348-0788
Registry dates
- Enumerated
- 2007-05-17
- Last updated
- 2024-03-07
- Certified
- 2024-03-07
Frequently asked questions
- What is Katharine Ball's NPI number?
- Katharine Ball's National Provider Identifier (NPI) is 1801004650, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Katharine Ball's specialty?
- Katharine Ball is listed in the NPPES registry with a primary specialty of Dermatology Physician (Allopathic & Osteopathic Physicians).
- Where is Katharine Ball located?
- Katharine Ball's practice location on file with NPPES is 18988 Cox Ave Ste B, Saratoga, CA 95070-4154.
- What is Katharine Ball's phone number?
- The practice phone number listed in the NPPES registry for Katharine Ball is (408) 253-4407.
- Does Katharine Ball accept Medicare?
- Katharine Ball is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Katharine Ball's NPI active?
- Yes — Katharine Ball's NPI (1801004650) is active in the NPPES registry as of the last update on 2024-03-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.